# Copyright 2005-2025 Mark Dufour and contributors; License Expat (See LICENSE)

import binascii


def b64encode(s, altchars=None):
    return b''

def standard_b64encode(s):
    return b''

def urlsafe_b64encode(s):
    return b''

def b64decode(s, altchars=None, validate=False):
    return b''

def standard_b64decode(s):
    return b''

def urlsafe_b64decode(s):
    return b''
